Improvement in steam-cylinders



@Halimi 5mm @met www-WW- JQAHLAWSQN, or ALLEGHENY CITY, PENNsYL'VANiA.

` Lener; Paume No. 85,940, dated .mnuwry 19, 1869.

MPROVEMENT IN STEAM-CYLIDERS.

ThoSchedule referred to in these Letters Patent and making part of the same.

To all whom it concern Be it known that I, JoAn Lswsomot. Allegheny City, in the county of Allegheny, and State of .Penn- Sylvania, have invented certain new and useful Improvements in Steam-Cylinder Heads; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

In the accompanying-drawings-- Figure 1 is a vertical section of my improvement in cylinder-heads, as applied to an ordinary steamcylinder.

Like letters of reference denotecorresponding parts.

The nature of my invention consists in providinga suitable cylinder-head, with an annular extension, B, having a projecting auge, Bi, at right angles lisoln the joint ange R, said projecting flange B2 being bored out in a suitable manner to t the flange of cylinder A.

The extension B is provided, in a suitable manner, with an induction-port, B, at or near the ordinary counter-bore or clearance S, which port B' corresponds' and adjoins, in a suitable manner, the steam-passage B'.

The extension B is bored out exactly the same diameter astbe cylinder A, and is attached to the same by bolts, or such like devicesfthe whole so arranged, constructed, and put together that the piston A', in its stroke, will travel both in the cylinder A and extension B, and the steam used for the backstroke will flow from the induction-port B of extension B.-v

As heretofore cylinders and cylinder-heads have been constructed, the induction-ports have been contained in the cylinder, at or near its mouths,.and great diiculty has been found, after-taking o the head and drawing out the piston, to adjust its packing, in replacing thepiston, since,'oftentimes, the packing gets into the steam-port, causing not only considerable manual labor to disengage the same, but also causing considerable injury to the packing-rings. This is often found the case, especially in steam-hammer pistons,

the packing of' which is generally of peculiar shape and construction, and also, especially in what is termed steam-packing, which, being generally made in segments, is difficult to put in without closing up the ports beforehand with wood, or such like material, causing time and labor.

By the use of my devices, the piston A can be I.

withdrawn, after taking o the head B, the packing adjusted, and the piston replaced without trouble.

Since the steam or induction-port B is contained in` the cylinder-head B, there is no inlet or space the packing can catch in, and when the head Bl is attached to the cylinder A, the whole being,- as it were, solid, no trouble is found, thus saving expense, and unnecessary manual labor.

The devices herein described are applicable to either front or backheads.`

Having thus described the nature, construction, ad- 

